m 
of the Ornithorhynchus Hystrix. 
There was no csecum, the intestine suddenly enlarging to 
form the colon : on each side of the anus there was a bag, as in 
the otter, and most other animals which have no caecum. 
The organs of generation, in both sexes, were distinct from 
the anus ; the penis was small. In the female there were two 
nipples upon the breast. The uterus was broad at its fundus ; 
and the two horns separated from each other, nearly at right 
angles to the middle line of the uterus. 
The didactyla is the only species of Myrmecophaga which 
has come under my observation. The Trustees of the British 
Museum allowed me, in the most liberal manner, to examine 
both the male and female. The tongue had a general resem- 
blance to that of the Ornithorhynchus Hystrix ; but there were 
no cuticular teeth upon it, or on the palate. The caecum was of 
the same kind, but double, and each of them was only £ of an 
inch in length. In the other parts there was no similarity. The 
male had four false nipples, two on the breast and two on the 
belly, corresponding with the true nipples of the female. 
The organs of generation were not connected with the 
rectum. The uterus was nearly of the shape of the human 
uterus ; its coats were very thin ; and the cavity larger in pro- 
portion than in most quadrupeds. There were no horns ; and 
the fallopian tubes went off from the posterior part. This is an 
approach to the uterus of the Opossum. 
With a view to procure information respecting the other 
species of Myrmecophaga, I wrote to Mr. Cuvier of Paris, 
whose abilities and extensive researches in comparative anatomy, 
have so deservedly distinguished him in that branch of science. 
By a letter from him, I find that the Myrmecophaga jubata, 
Tamandua,and capensis, belong decidedly to the class Mammalia; 
3 a 2 
i 
